About Advanced Operation - Carrier Aquazone 50QE900-NPWS Owner's Manual

About Advanced Features & Operation
2 STAGE OPERATION - The 2nd Stage of heat or cool is
turned on when (1) the 1st Stage has been on for a
minimum of two minutes, and (2) the temperature spread
from the setpoint is equal to or greater than: the setpoint
plus the deadband, plus 2 degrees.
Heating
2 degrees
2nd Stage 1st Stage
turn on turn on
MINIMUM HEAT/COOL SETPOINT DIFFERENCE - The Heat
and Cool setpoints will not be allowed to come any closer
to each other than the value set in Advanced Setup step
# 2, on page 7. This minimum difference is enforced
during Auto changeover
Cooling
Dead Dead
Band
Band
2 degrees
Heat Cool 1st Stage
turn on
Setpoint Setpoint
and Program On operation.
Page 10
2nd Stage
turn on